39results about How to "Precise resizing" patented technology

The invention provides a drum-type precision seeder, relates to a seeding machine and in particular relates to a spaced quantitative seeding machine. The drum-type precision seeder disclosed by the invention has no harm on seeds and has few faults. The drum-type precision seeder comprises a center shaft (1) and a shaft sleeve (2), wherein the shaft sleeve is capable of rotating around the center shaft; a center chain wheel (21), a first housing (31), a cylindrical peripheral wall (33), a second housing (32) and a duckbill (4) are fixed on the shaft sleeve. The drum-type precision seeder also comprises a plurality of guide parts, a seed wheel assembly, a fixed wheel (6), a roller brush shaft (71), a roller brush shaft chain wheel (72) and a roller brush (73), wherein the roller brush shaft chain wheel is connected with the center chain wheel through a chain; a seed chamber (61) is arranged in the fixed wheel; the lower end of the sidewall of the seed chamber fits with the roller brush and a seed wheel body (51); a seed falling opening (62) is further formed in the fixed wheel; the seed wheel assembly comprises the seed wheel body (51); a plurality of indent grooves (5121) are formed in the outer peripheral wall of a wheel body part (512) of the seed wheel body at equal intervals.

The invention discloses a simulation method for an adjustable weight module of a cellular neural network. A memristive synapsis bridge circuit is built mainly on the basis of a memristor to carry out simulation, and the magnitude and the time of the input pulse of the memristive bridge circuit can be regulated to accurately obtain a required cellular neural network weight template. By use of the simulation method, the adjustable weight module of the cellular neural network can be realized.

The invention relates to the field of mining equipment, especially to a multiple-cylinder rolling bearing hydraulic cone crusher. The multiple-cylinder rolling bearing hydraulic cone crusher comprises the following components: a frame, a transmission mechanism, an eccentric mechanism, a moving cone set and a moving cone anti-reverse rotation mechanism. According to the invention, the frame comprises a lower frame and an upper frame; the transmission mechanism, the eccentric mechanism, the moving cone set and the moving cone anti-reverse rotation mechanism are all installed on the lower frame; the transmission mechanism is connected with the eccentric mechanism; the lower end of the moving cone set is arranged inside the eccentric mechanism; and the upper end of the moving cone anti-reverse rotation mechanism is connected with the lower end of the moving cone set. The multiple-cylinder rolling bearing hydraulic cone crusher is characterized in that the space of the lower frame is reasonably arranged and the axial angle of a fixed cone can be adjusted by the upper frame, so as to change the size of a crushing cavity. Eccentric rotation and swing of the moving cone set are also stable.

The invention discloses a casting guiding device. The device comprises a broadside guiding device and a lateral side guiding device, wherein the broadside guiding device comprises an outer arc broadside roller row and an inner arc broadside roller row which are distributed in parallel along the casting direction; the lateral side guiding device comprises a left lateral side roller and a right lateral side roller which are distributed in parallel along the casting direction; the outer arc broadside roller row, the inner arc broadside roller row, the left lateral side roller and the right lateral side roller together enclose a casting guiding channel; and after a cast blank is out of a crystallizer, under restriction of the casting guide channel, no bump is generated even if the pulling speed is high and the thickness is large. Furthermore, the casting guiding device can accurately adjust the size of the casting guiding channel to adapt to the requirement for producing various cast blanks in different specifications, and can be applied to continuous casting machines for conventional plate blanks and extra thick plate blank.

The invention relates to an electrospinning device, in particular to an efficient nanofiber spinning device. The efficient nanofiber spinning device comprises a high-voltage direct-current power supply, a motor driving device, transmission devices, rotating shafts, bearings, a solution tank, a grate plate, rotary needle cores, a collecting plate and a liquid supply device; the positive pole of thehigh-voltage direct-current power supply is connected with the solution tank, and the negative pole of the high-voltage direct-current power supply is connected with the collecting plate and grounded, so that a high-voltage electric field is provided for liquid surface conical-tip jet flow excitation; the collecting plate is located above the solution tank and used for depositing solid nanofibers; a micropipe array is arranged on the grate plate, the rotary needle cores are installed in micropipes, and the needle tips of the rotary needle cores stretch out of the micropipes; the motor drivingdevice drives the rotating shafts to rotate coaxially through the transmission devices; the inner rings of the bearings sleeve the rotating shafts, and the outer rings of the bearings are fixed to the bottom of the solution tank; the rotating shafts are connected with the rotary needle cores through clamps; the liquid supply device is connected with the solution tank through a liquid delivery pipe.

The invention belongs to the technical field of medical instruments and particularly relates to the technical field of interventional instruments in third-class medical instruments, in particular to a transcatheter heart annuloplasty system. The transcatheter heart annuloplasty system comprises a forming ring assembly, wherein the forming ring assembly comprises a macromolecular braided tube, an anchor nail, a contraction line and a bidirectional contraction device; a delivery assembly, wherein the delivery assembly is used for conveying the forming ring assembly to a target position; and a continuous anchoring assembly, wherein the continuous anchoring assembly is used for fixing the forming ring assembly to the target position. Through the bidirectional contraction device based on a compression spring, a friction disc and a wire spool, bidirectional contraction of a forming ring fixed to a valve is achieved, the strength and size of contraction of the valve are accurately adjusted, locking can be achieved at any time, a doctor is allowed to adjust the contraction degree of the valve according to different conditions of different patients, and the doctor is allowed to make adjustment in an opposite direction, so that the size change of the valve during continuous opening and closing is adapted, thus, the success rate of an operation is guaranteed, and secondary operation correction is avoided.

The invention discloses a broadband amplifier with operating frequency approaching fT/2; the invention adopts the technical scheme that the LC series resonant circuit is connected in parallel with thecascode structure, which improves the high-frequency gain of the gain unit and expands the low-frequency bandwidth of the gain unit at the same time, and furthermore, realizes the effect of high gainand wide frequency band at the position approaching to fT/2. The matching circuit of the invention is composed of on-chip passive devices, and when designing the matching network, the parasitic effect of the signal input and the output Pad in the F band is taken into consideration, so that the stability and the feasibility of the circuit are ensured. The gain unit in the present invention is biased by a bandgap reference circuit, and the bias current can be accurately adjusted by controlling the bias voltage to achieve the optimal performance of the amplifier.

The invention discloses a self-adjusting bevel gear test box with an adjustable offset distance, and belongs to the technical field of mechanical design. The self-adjusting bevel gear test box comprises a box body; two mutually vertical wheel shafts are horizontally arranged in the box body; a bevel pinion is arranged on a pinion shaft; a shaft sleeve is arranged on a bull gear shaft; a rotatablebevel gear wheel is arranged on the shaft sleeve; fixing nuts are arranged at two ends of the shaft sleeve; a compression spring is arranged between the fixing nuts and the shaft sleeve; the pinion shaft is rotatably arranged in an eccentric shaft seat; the eccentric shaft seat is connected with an adjusting disc; a bull gear is arranged on the eccentric shaft seat; a worm and worm wheel mechanismis arranged in the box body and comprises a worm and a worm wheel arranged on the bull gear shaft; the pinion on the worm is meshed with the bull gear; and the worm wheel is connected with the fixingnuts through a spline sleeve mechanism. Various dynamic performance tests and analysis can be carried out on bevel gears with different offset distances and installation distances through one gear box, and the positions of the bevel gears can be changed automatically and adaptively according to adjustment of the offset distances in the test process.

The portable film processing dark box includes box lid, and box body. Developer tank, rinse tank, and fixing bath are setup in the box body. Film delivery box, power box, two handling ports with lightproof raglan sleeve is setup on sidewall of the box body. Developing red light connected to wires of power box is installed on inner sidewall of the box body. Window for looking film is setup on the box lid. The portable film processing dark box can be easy to carry to site of X ray photography. Procedures of taking X ray photo, developing film, watching film and adjusting steps can be realized in sickroom area. Fine structure of bone is displayed sharply. The invention raises merit factor of photos (raised to 96% from 48%).

The invention relates to the field of mine equipment. An upper frame of a multi-cylinder cone crusher comprises a connecting frame and a fixed cone frame, wherein the fixed cone frame comprises a fixed cone body, a fixed cone lining plate, a fixed cone driving top plate and a fixed cone driving side plate, wherein the fixed cone lining plate is installed in the fixed cone body in a positioning manner; the outer side wall surface of the fixed cone lining plate is also provided with a fixed cone pin boss which is integrally connected with the outer side wall surface; the fixed cone pin boss is flexibly connected with and fixed on the fixed cone body via a fixed cone connecting structure; the outer side wall surface of the fixed cone body is in threaded connection with the inner side wall surface of the connecting frame; the outer side surface of the fixed cone driving side plate is provided with a driving ring large gear ring; the driving ring large gear ring and the fixed cone driving side plate are in peripheral positioning, and are not in axial positioning; the connecting frame is provided with a regulating motor and a large gear ring support base which connected in a drive mode; the large gear ring support base is used for axially positioning the driving ring large gear ring. The upper frame of the cone crusher can adjust the axial height of the fixed cone so as to change the size of the crushing cavity, and also has a shock absorption effect, so that the service life is prolonged.

The invention discloses a fine-tuning type mechanical structure for accurately measuring the pressure. The mechanical structure is used for detecting a pressure source and comprises a placement assembly for contacting a pressure source, a telescopic assembly, a seat body assembly, a sliding assembly, an installation seat, a side tension spring, an elastic piece, a spring mounting block, a pressure sensor and a micrometer head; the upper part of the pressure sensor abuts against the lower end of the spring mounting block; the seat body assembly is installed on the sliding assembly, the sliding assembly is installed on the installation seat in a sliding mode, the micrometer head is arranged on the installation seat and abuts against the lower end of the sliding assembly, one end of the side tension spring is fixed to the sliding assembly, the other end of the side tension spring is fixed to the installation seat, and the micrometer head and the side tension spring are arranged on the two sides of the sliding assembly. The pressure sensor is used for feeding back the real-time pressure value, the micrometer head is used for finely adjusting the height, and the pressure value is accurately adjusted; maintenance is simple, the pressure value can be fed back and visible in real time, misdetection and misjudgment of products are reduced, and the productivity can be improved.

The invention discloses a toilet for recumbent women with two feet disabled, belonging to the technical field of the toilet for the disabled. The toilet for recumbent women with two feet disabled comprises a base, a movable toilet bowl, a backrest device, and a movable trolley. The base is provided with a groove hole that is equipped with chutes on both sides. The movable trolley is installed in the chutes and capable of moving back and forth in the chutes. The backrest device is connected to the base through a regulating motor and the user can adjust the angle of the backrest device through the adjusting motor. When lying on the backrest device, the user can press the control key of the backrest device to control the position of the movable toilet bowl, thus defecating.

Image data is accurately resized in real time by downscaling. An image signal generating apparatus includes a parameter generator that dynamically generates a parameter PM and an image signal generator that repeats processing of generating an output image signal Q in response to each sampling signal B. Each parameter includes a division ratio parameter DP. The division ratio parameter DP corresponds to a ratio of a second time period Tb and a third time period Tc other than the second time period Tb. The second time period Tb is a time interval until the generation of a sampling signal B_n in a first time period Ta until input of an immediate timing signal A_k+1 since input of a last timing signal A_k. The image signal generator repeatedly generates a first weighted signal and a second weighted signal of the image signal in response to each sampling signal B_n.